170 nXYCIIOTEUTinS. 



O. BREYTMANUS. Gould. PI. 74, fig. 303. 



Body cylindrical, tapering behind, fins rhomboidal, one-third 

 the length of tlie body, head short, subglobosi- ; sessile arms 

 sliort :ind slender, lower pair longest, and upper pair shortest ; 

 tentacles very short, nearly destitute of a club. 



Length, 6 inches. 



Samoan Islands. 



Described from a drawing which is evidently very imperfect. 

 so much so, that but little reliance can be placed on it. It may 

 well be doubted whether this and several following species are 

 specifically distinct from 0. Banksii : its identity with Mr. 

 ({abb's 0. sequimanus is very probable. 



0. yEQUiMANUS, Gabb. PI. 74, figs. 304, 305. 



Body fusiform, pointed behind; fins rhomboidal. nearly half 

 the length of the body, outer angle pointed; head small, very 

 slightly subquad rate ; sessile arms nearly e<|i-al in >i/e. about 

 two-fifths the length of the body, relative lengths -2. :>. 4. 1. the 

 ventral arms connected with the third pair by a small mem- 

 branous expansion ; cupules small and numerous ; tentacles more 

 than twice the length of the arms, slender, the club narrow, with 

 numerous rather small claws. Shell narrow, widest near the 

 middle, rounded at upper end. very narrow below and at t lie point, 

 dilated into a shallow slipper-like termination. Length. (\ inches. 



Society Islands. 



Described from specimens long preserved in alcohol. 



0. FUSIFORMIS, Gabb. 



Body slender, fusiform, pointed behind ; head small, narrower 

 than the body, subquadrat e ; arms not half as long :1 s the body, 

 relative lengths 1. -J. 4. '! ; tentacles somewhat longer, the clubs 

 but little if at all widened; lins triangular, terminal, half the 

 length of the body. Shell long, very slender, widest in middle. 



Length, about (\ inches. Not figured. 



" Said to have been caught off Cape Horn." San Clemente 7., Gal. 



O. LOP, 1 1- KN MS. Da 11. 



Body Short, inflated, somewhat cup-shaped, rounded behind; 

 tins rounded, ovate on each side, not continuous round the po*- 



